Searching For A Bandwidth; Tracking The Amplitude That You Are Searching; Example Of Searching For A Bandwidth Using Markers - HP 8753E User Manual

Searching for a Bandwidth

The analyzer can automatically calculate and display the -3 dB bandwidth (BW:), center
frequency (CENT:), Q, and loss of the device under test at the center frequency. (Q stands for
"quality factor," defined as the ratio of a circuit's resonant frequency to its bandwidth.) These
values are shown in the marker data readout.
1. Press m and turn the front panel knob, or enter a value from the front panel keypad to
place the marker at the center of the filter passband.
MarkerF
4. If you want to change the amplitude value (default is -3 dl3) that defines the passband or
Figure Z-27. Example of Searching for a Bandwidth Using Markers
the Amplitude that You Are Searching
1. Set up an amplitude search by following one of the previous procedures in "To Search for a
Specific Amplitude. n
with every new trace and put the active marker
When tracking is not activated, the analyzer IInds the specified amplitude on the current
sweep and the marker remains at same stimulus value, regardless of changes in the trace
response value with subsequent sweeps.
ctn) '~~~~~~~ to access the marker search menu.
point.
on that
Making Measurements 236
search